[An edited image by EV-Zero on DeviantArt: https://www.deviantart.com/ev-zero/art/You-keep-making-me-weak-730847866]

His name is Speedy, & the reason why he's frozen is because of his ex-girlfriend Lapis. They got in an argument & she froze him out of anger, then she ran away in horror as to what she did. When frozen, he can't speak & isn't technically awake. He's basically in suspended animation until someone gets him out of the ice, then he can function normally again.